six bridges and freeways that were closed then will be open this time. but a highway tunnel used as a pedestrian access point that became clogged with thousands last time will be closed this year. and officials say they will have more metal detectors in use and advisories on social media, hoping to avoid the long lines, some that never moved. >> there's over 500 pole-mounted signs that last time that didn't even exist. we have also increased a number of way finders, people giving people direction, telling people where to go. >> reporter: so far, officials say they know of no credible threats to the ceremonies, but they will be out in force, hoping to make sure nothing goes wrong. pete williams, nbc news, washington. as we look ahead to tomorrow, i'm joined here by brian williams. brian, i went back and looked at the president's remarks four years ago, part pep talk and also a lot of talk about the hope, the end to conflict and discord. that part didn't work out so well. how does he frame the next four years?